Operating mechanism for controlling movement of elements in sequence



R. A. BLOOD April 21, 1931.

OPERATING MECHANISM FOR CONTROLLING MOVEMENT OF ELEMENTS IN SEQUENCEFiled May 17, 1929 3 Sheets-Sheet l R. A. BLOOD 1,801,654 OPERATINGMECHANISM FOR CONTROLLING MOVEMENT OFELEMENTS IN SEQUENCE April 21,1931.

3 Sheets-Sheet 2 Filed May 1'7, 1929 Ap'ril 21, 1931.

R. A. BLOOD,

OPERATING MECHANISM FOR CONTROLLING MOVEMENT OF ELEMENTS IN SEQUENCEFiled May 17. 1929 3 Sheets-$heet 5 Patented Apr. 21, 1931 ROBERT A.BLOOD. OF

SYRACUSE, NEW YORK, ASSIGNOR TO CROUSE-HINDS COMPANY,

OF SYRACUSE, NEW YORK, ,A. CORPORATION OF NEW YORK OPERATING MECHANISMFOR CONTROLLING MOVEMENT OF ELEMENTS IN SEQUENCE Application fi1cd May17, 1929. Serial No. 363,974.

This invention relates to an operating mechanism for controlling themovements of a plurality of elements in a certain sequence, similar tothat described in my application Sr. No. 118.651 since abandoned, andhas for its object a particularly simple, compactand easily operablemechanism by which a plurality of mechanical movements or aplurality ofmovements or operations are brought about in a certain sequence, by

power.

The invention consists in the novel features and in the combinationsandconstructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawings in which like characters designate corresponding parts in allthe views.

Figure 1 is a diagrammatic view of this operating mechanism, the samebeing shown a as applied to a molding machine.

Figure 2 is adetail sectional view of the controlling mechanism.

Figures 3 and 4 are respectively a plan -view and a side elevation ofthe parts seen in Figure 2.

Figure 5 is Figure 2.

Figure 6 is a sectional view' on the plane of line 6 6, Figure 2. Thisoperating mechanism for controlling the movements of a plurality ofelements having relative movement in a certain sequence comprisesgenerally, an air pressure chamber, a plurality chamber to said elementsrespectively, an air motor, normally closed valves for controlling theoutlets, one of the outlets leading to the motor, a single member havingmeans for operating the valves in sequence,

a sectional view on line 55,

the motor bemgconnected to said member to actuate it and a manual 'forinitiallyopening the valve which normally closes the air outlet to themotor.

The invention further includes valves which normally permit the air toexhaust from the air outlets back through the outlet pipes controlled bythe valves, invention further includes normally .open

and the single member operof outlets from said that is, the

ates to first close these valves before opening the controlvalves.

The plurality of elements having relative movement in a certain sequenceare here shown as .the elements of a core making machine or what iscalled machine. I

This machine consists of a sand chamber A shiftable into andout ofposition to receive sand from a sand hopper B, a core box Carrangcd toreceive sand from the chamber A when the sand chamber is out ofregistration with the sand hopper B, this core box having a movementtoward and from the end of the sand chamber, a core box clamp D forclamping it tightly ata right a pneumatic core angle to its movementtoward and from the bottom of the same chamber and a station- .ary topordomeE for the sand chamber when itis in register with the core box C.

This dome E has means at F for forming an air tight joint 01' seal whenthe sand chamber A is under the dome E. The dome alsohas an air inletand an air outlet. The

sand chamber A has a movement with the core box-toward and from the domeE. The sand chamber A, corebox C, and core box clamp D may be consideredmovable elements as well as the diaphragm in the diaphragm chamber Nwhich controls the air to the dome E. Although the dome E is notmovable, it receives air to compress the sand in the sand chamber. Theair for effecting the movements of the sand chamber A, core .box C, corebox clamp D and for effecting the flow of air into the dome E and sandchamber A and out through the'exhaust G of the sand chamber, iscontrolled by the operating mechanism forming the subject matter of thisinvention.

This operating mechanism as here shown includes a suitable casing orblock 1 formed with an air pressure chamber 2 having a plurality ofpassages 3, 5, 6 leading therefrom or opening through one wall thereof,the passages being formed with outlet ports 7, 9, 10 which are connectedthrough outlet ipes 11, 13, 1a to various elements, A, C, E.

he chamber is connected to a suitable source of compressed air or othermotive fluid through a pipe 15.

A passage 4 in the block is disconnected from the chamber 2 and isformed w1th a port 8 connected by a pipe 12 to a normally closed valvechamber to be presently described. This controls the operation of anelement E.

In this embodiment of my invention, the air from the various elements towhich it is supplied exhausts through the pipes 11, 12, 13 and 14 intothe passages 3, 4, 5 and 6 and out through exhaust ports 16, 17, 18 and19, these being connected through passages 20, 21, 22, 23to a commonexhaust pipe.

24, 25, 26 and 27 are controlling valves for the passages 3, 4, 5 and 6respectively, these valves bein normally held closed or against theirseats y springs 28, 29, 30 and 31 and being operated off their seats aswill be hereinafter described.

32 is a movable member of a pressure operated motor as a piston movablein a passage 33 formed in the case or block 1. All of the passages 3, 4,5, 6 and 33 are preferably parallel and 3, 4, 5 and 6 arranged in a row.

The outlet pipe 11 controlled by the valve 24 has a branch 34 connectingit to the piston chamber 33.

Also, in the passages 3, 4, 5 and 6,, are plungers 35,36, 37 and 38having ports 39, 40, 41 and 42 which register with the exhaust ports 16,17 18 and 19. The ports 39, 40, 41 and 42 opening through the upper endsof the plungers in position to coact with valves 50, 51, 52 and 53, thevalves 50, 52, 53 being carried by the valves 24, 26 and 27, the valves50, 52 and 53 being normally open and the valve 51 normally closed.Thus, normally, the air can exhaust back from the outlet pipes 11, 13and 14 through the ports 7 9 and 10 and the ports 39, 41 and 42 outthrough the exhaust pipes 16, 18 and 19, but not through the pipe 12,passage 4 and passage 40. These passages 16, 17, 18 and 19 are connectedto a suitable common exhaust pipe 54.

The single member for operating the valves in sequence comprises arotary member or shaft 55 having a plurality of cams 56, 57, 58 and 59thereon, these cams coasting with the valves respectively or theplungers 35, 36, 37 and 38 associated with each of the control valves24, 25, 26 and 27. The cams 57 58 and 59 are fixed to the rotary member55 while the cam 56 which acts to open the valve 24 has a movementrelative to the member 55 and is connected thereto by a lost motionconnection.

As here shown, the cam 56 is mounted upon a shaft 60 extending coaxiallyof the member 55 and rotatable therein, the cam working in a radial slot61 in the member 55 against the action of the spring 62, the slotforming a lost motion connection, as when the shaft 60 is rotated torotate the cam 56, the cam 56 will be rotated until a shoulder thereonengages the end of the slot in the member 55. A handle 64 is mounted onthe shaft 60 to initially actuate it.

The plunger or piston 32 is connected to the member 55 to actuate itafter the valve 24 has been opened by the manually operated cam 56 andas here illustrated, the plunger is formed with a rack 66 meshing withthe gear teeth 67 on the the member 55. At the end 0 each operation, themember 55 is reset to its starting position by the movement of'theoperating handle 64 in a retrograde or clockwise direction and in orderto permit a retrograde movement of the cams 56,57, 58 and 59 withoutactuating the valves 24, 25, 26- and 27 or the plungers 35, 36, 37 and38, means is provided for permitting a ratcheting action between thecams and the plungers with which they coact.

As here shown, each of the plungers is provided with a follower in theform of a roller 68, this roller having an axle movable in an angularslot 68 havingan upwardly extending portion. Movement in the forwarddirection tends to move the roller and its axle to the lower end of theslot and movement of-the member 55 in a retrograde direction permits theroller 68 and its axle to move upwardly in the slot without actuatingthe plunger 35, 36, 37 or 38.

The movement of the motor or piston 32 under the air pressure isretarded and regulated by a dash pot, and as here shown, the lower endof this piston 32 constitutes the plunger 69 ,movable into a dash pot oroil chamber 70 formed in the casing or block 1. The chamber 70communicates through a small needle valve controlled passage 71 with anoil reservoir 72. Also, a spring pressed check valve 74 is locatedbetween the dash pot chamber 70 and the reservoir 72, which check valvepermits the oil to fiow freely into the dash pot chamber during upwardand retrograde movement of the piston 32. As the operation of dash potsare well known, further description is thought to be unnecessary.

In operation, the parts of the core machlne are in their position shownin Figure 1, but the cam is in its position in which it has beenpreviously operated by the piston 32. The operator first resets theparts in their starting position by operating the handle In a retrogradeor clockwise direction or to the right, Figure 1, thus bringing thecamsof the operating mechanism in their position shown in Figure 1. Hethen operates the handle 64 slightly in an antl-clockwisedirection, thusturning the cam 56 relatively to the member 55 cansing it to hit theplunger 35, close the exeriphery of i as v actuates the plunger 37closes 'the exhaust haust ort 16, open thecontrol valve 24 so that t eair passes from the chamber 2 through the passage 7, pipe 11-to a pistonI in a piston chamber J, which piston is connected to the sand chamber Ato actuate the sand chamber against the spring H, into a position whereit is in register withthe core box and the air dome E. Air also passesfrom the pipe 11 through the pipe 34 to the piston chamber 33 andactuates the piston, which through the rack66 and the gear 67 turns thecam member 55, thus continuing to automatically rotate the member andhence, the cam 56 and the cams 57, 58 and 59. The rotation of the cam 59lifts the plunger 38, closes the exhaust passage 19 and valve 53 andopens the control valve 27 permitting air to pass from the chamber 2through the passage 6, port 10, outlet pipe 14' to an exhaust valvechamber'K which closes the exhaust valve L on the end of the exhaustpipe G from the air dome E, thus closing the air dome E against theoutlet of air. 7

Movement of the cam 58 correspondingly passage 18 and opens the controlvalve 26 permitting air to pass from the chamber 2,

through the passage 5, outlet port 9 and outlet pipe 13 to an air motoras a diaphragm chamber M which actuates' the core box clamp D and afteractuating said diaphragm, the air passes from the dia hragm chamberthrough a pipe 13 to a c amber 13 under the core box and lifts the corebox against the bottom of the sand chamber A and lifts the sand chamberagainst the air seal of the dome E.

Movement of the cam 57 actuates or lifts the plunger 36, and o ens thevalve 51 so -f that air can exhaust rom pipe 12 from a valve chamber 2having a normally closed spring pressed valve S therein.- The valvechamber is connected by a pipe T to a dlfiphragm chamber N. Thediaphragm is spring'pressed and normally closes the entrance of air froma supply pipe to the dome" E. The pipe P is connected to a suitablesource of supply. There is a by-pass 50 around the diaphragm for thepipe P- to the diaphragm chamber .N, so that. when the pipe 12'isclosed, the pressure is equal on both sides of the diaphragm and it willbe held closed by its spring and hence, cut off the air dome E from thepipe P. The port 40 in the plunger 36 is a slot so that the port 17 isalways open and controlled only by the valve 51. Y i

The movement of the core box upwardly by the air in the chamber 13 alsolifts the sand chamber against the air seal F and also actuates a rod Woperating to open the valve S in the chamber R and hence, open the pipe12. When this valve S is so opened, the

pressure in the diaphragm chamber N colv 'Although this valve mechanismlapses permitting the pressure in the-pipe P to lift the diaphragm andpermit air to enter the sand chamber and force the sand in the chamberinto the core box to form the core. -It will be borne in mind that thisfeature takes place when the plunger 36 and valve 51 are being held upby thecam 57.

The high points of the cams 56, 57 58 and 59 are in such proportions andsuitably timed as tobring about the, operations in the proper sequenceand: for the desired length of time. r

For instance, the high point of the cam 56 is long enough to hold thevalve 24 open during all the time that the other cams 56, 57, 58and 59are operated, while thehigh point of the cam 57 is located and is ofsuch extent as to open the pipe 120nly momentarily and then only whilethe sand vchamber is registering with the dome'E, while the high pointofthe cam 58 is long enough to holdthe core box G and the sand chamber Aelevated'in air tight sealed relation with each other and with the domeE, while the sand chamber is under and air sealed to'the. dome E and thehigh point of the cam-s59 is soglocated as to hold theexhaust= valve Lclosed while'the diaphragm valve N is open of each operation, the aircan; exhaust from the various lines and allpartsarein; their normalpositions except, the member 55 and the'piston'32. Hence, at thestart-.ofeach "operation, thelhandle 64must be first operated in aretrograde or=-clockwise direction to restore the cams 'to'theirstarting position and -cl-u'rin such retrograde movement of thec"am's,lt e followers 68 coactingwith the cams are ireeto ratchetrelatively tothe plungers 35, 36, 37- and.38.-. i

as applied a to effect a certain sequence of movement 'in ascoremakinmachine, evidently it' can beapplied-to lei fect sequence of movementinanytakind of. a machine. I

-What Iclaim'is:

f'ltThe -combinationhwitha plurality of elements having arelative-movement in a certainwsequence', of an operatlng mechanism forcontrolling such movements comfprislng anairchamber having a pluralityof outlets leading to said elements respectively, a second chamberhaving a movable pressureoperated elementv therei'n, one of the-outletsleading to the second chamber,

normally -I closed valves for controlling the cams for opening thevalves insequence, the cam coacting with thevalve which normally closesthe 'air outlet leading to the second 'outlets a rotar'y controllermember having 3 chamber being mounted to move relatively to the rotarycontroller member, and a manual for initially moving said cam relativelyto the rotary controller member.

2. The combination with a plurality of elements having a relativemovement in a certain sequence, of an operating mechanism forcontrolling such movements comprising an air chamber having a pluralityof outlets leading to said elements respectively, a sec- 0nd chamberhaving a movable pressure operated element therein, one of.the outletsleading to the second chamber, normally closed valves for controllingthe outlets, a rotary controller member having cams for opening thevalves in sequence, the cam coacting with the valve which normallycloses the air outlet leading to the second chamber being mounted tomove relatively to the rotary controller member and connected thereto bya lost motion connection, and a manual for initially moving said camrelatively to the rotary member. I

3. The combination with a plurality of elements having a relativemovement in a certain sequence, of an operating mechanism forcontrolling such movements comprising an air chamber having a pluralityof outlets leading to said elements respectively, a second chamberhaving-a movable pressure operated element therein, one of the outletsleading to the second chamber, normally closed valves for controllingthe outlets, a

tain sequence comprising an air supply chamber, a plurality of outletsleading from said chamber to said elements respectively, normally closedvalves for controlling the outlets, a second chamber havin a pressureoperated element therein, one o the outlets leading to the secondchamber, a rotatable cam member having means for operating the valves insequence, motion transmitting means between the movable pressureoperated element and said member, and a manual for initially opening thevalve which normally closes the outlet to the second chamber in whichthe movable pressure operated element is located.

In testimony whereof, I have hereunto signed my name, at Syracuse, inthe county of Onondaga and State of New York, this 30th day of April,1929.

ROBERT A. BLOOD.

rotary controller member having cams for y opening the valves insequence, the cam coactin with the valve which normally closest e airoutlet leading'to the second chamber being mounted to move relatively tothe rotarycontroller member and connected thereto by a lost motionconnection,

and a manual for initially moving said cam relatively to the rotarymember and to reset the controller member in a retrograde direction, thevalves having means coacting with the cams to have a ratcheting movementduring the rotrograde movement of the cam.

n operatingmechanismof the class described compris ng an air su plychamber having an outlet leading there rom, a second chamber having amovable pressure operated 7 element therein, a normally closed valve forcontrolling the outlet, a rotatable cam mem her having means for holdingsaid valve open after it has been initially opened, motiontransmittingmeans between said element and the controller member toactuate the latter, and a manual for initially opening the valve.

5. The combination with a plurality of elements having relative movementin a certainsequence, of an operating mechan sm for controlling saidmovements, comprising a plurality of pipes for a motive fluid, normallyclosed valves for controlling said pipes, a pressure operated member andthe

